| 摘要 |
PROBLEM TO BE SOLVED: To provide the color slippage detector of a color copying machine or the like by which adjustment is simplified as well as enhancing detection accuracy, and noises are reduced as far as possible and which is suitable for the reduction of a production cost. SOLUTION: This detector is provided with an LED projecting unit 32 to project a toner pattern 31 and a PD photodetector 33 to receive the reflected light of the toner pattern 31 by passing through a rod lens array 34 and a filter 35, and is provided with plural light-transmitting parts by which the toner patterns 31 are formed as plural toner patterns and which are formed so as to correspond to the plural toner patterns on the filer 35, and also is provided with a signal processing circuit by which an output signal outputted by the PD photodetor 33 when the toner pattern coincides with a part of the light- transmitting part is formed as a relative reference threshold and a detected signal is outputted by comparing the output signal outputted by the PD photodetor 33 when the toner pattern coincides with a whole light-transmitting part with the relative reference threshold. |
